|
Calendar of Physics Talks Vienna
| CoQuS Colloquium Seminar Talk by Eugene S. Polzik |
| Speaker: | Eugene S. Polzik (CoQuS) |
| Abstract: | "Tracking motion beyond the uncertainty limits" - for further information please access www.coqus.at |
| Date: | Mon, 23.04.2018 |
| Time: | 16:30 |
| Duration: | 120 min |
| Location: | TU Wien, Gußhausstraße 27-29, HS9 |
| Contact: | CoQuS-Team |
| Intersecting branes, Higgs sector, and chirality from N=4 SYM with soft SUSY breaking |
| Speaker: | Marcus Sperling (Univ. Wien) |
| Abstract: | 4-dimensional SU(N) N=4 super Yang-Mills supplemented by a certain cubic and quadratic soft SUSY breaking potential supports a rich set of non-trivial vacua with the geometry of self-intersecting SU(3) branes in 6 extra dimensions. The zero modes on these branes can be interpreted as 3 generation of bosonic (called "Higgs") and chiral fermionic strings connecting the branes at their intersection. After an introduction of the setup, I discuss a new class of exact solutions consisting of branes connected by Higgs condensates, leading to Yukawa couplings between chiral fermionic zero modes. A certain decoupling condition ensures that the backreaction of the Higgs on the branes vanishes, and the resulting physics is that of a spontaneously broken chiral gauge theory on branes with fluxes. |
| Date: | Tue, 24.04.2018 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | S. Fredenhagen, D. Grumiller, H. Steinacker |
| Surface structure and reactivity of perovskite oxynitrides |
| Speaker: | Ulrich Aschauer (Department of Chemistry and Biochemistry, University of Bern, Switzerland) |
| Abstract: | Owing to their reduced band gap compared to pure oxides, perovskite oxynitrides are a promising class of materials for photocatalytic water-splitting electrodes. While the bulk structure of these materials has been investigated both experimentally and theoretically, our knowledge about their surface structure is still very limited, despite that fact that it will dictate potential reaction mechanisms.
Based on our density functional theory (DFT) results we determine the anion arrangement in the bulk and at the surface to be different, as it is dominated by bonding and electrostatic considerations respectively. From our calculations we extract the preferred surface orientations and terminations and will discuss them both in terms of the chosen synthesis route and as a function of their environment. We will then compare the photo-electrochemical performance of different perovskite oxynitrid |
| Date: | Tue, 24.04.2018 |
| Time: | 16:00 |
| Location: | Technische Universität Wien, Institut für Angewandte Physik, E134 yellow tower „B“, 5th floor, Sem.R. DB gelb 05 B (room number DB05L03), 1040 Wien, Wiedner Hauptstraße 8-10 |
| Contact: | Univ.Prof. Dr. Ulrike Diebold |
| Soft gluon resummation for non-global observables in SCET |
| Speaker: | Dingyu Shao (CERN) |
| Abstract: | In this talk I will review our framework about non-global logs resummation.
Starting from a factorization theorem in SCET, we derive a parton-shower
equation for the resummation of non-global logs. We have applied our method to
investigate light-jet mass and narrow-broadening event shape resumation.
Recently, we have interfaced our shower with aMC@NLO_MG5 event generator to
obtain an automated framework to resum the leading logarithm of non-global
observables.
The corresponding references include 1803.07045, 1708.04516, 1610.01608,
1605.02737
|
| Date: | Tue, 24.04.2018 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock |
| Contact: | A. Hoang, S. Plätzer |
| A universal order parameter for inverse magnetic catalysis |
| Speaker: | Matthias Ihl (Porto U. & African Inst. Math. Sci., Cape Town) |
| Abstract: | I will present the results of a recent paper studying in detail the effect
of Inverse Magnetic Catalysis in holographic QCD. After explaining the
effect of magnetic field and chemical potential on the chiral phase
transition and the effect of (inverse) magnetic catalysis, I will present
the main result of the paper: a novel universal order parameter for
(inverse) magnetic catalysis.
|
| Date: | Wed, 25.04.2018 |
| Time: | 11:00 |
| Duration: | 60 min |
| Location: | SEM136, Wiedner Hauptstr. 8-10, 10th floor (yellow), 1040 |
| Contact: | Anton Rebhan |
| The upgrade of the ALICE detector |
| Speaker: | Dr. Werner Riegler (CERN) |
| Abstract: | ALICE is a dedication Heavy Ion experiment at the Large Hadron Collider at CERN. It is operating successfully since 2009 and will undergo a major upgrade in 2019/2020. This talk will discuss the physics motivations, the performance improvements as well as the subsystem details of the upgraded ALICE detector. |
| Date: | Wed, 25.04.2018 |
| Time: | 17:00 |
| Duration: | 60 min |
| Location: | Stefan-Meyer-Institut, Boltzmanngasse 3, 1090 Wien, Seminarraum 3-2-08 (2. Stock) |
| Contact: | Prof. Dr. Eberhard Widmann, Dr. Martin Simon |
| The ADM equations revisited |
| Speaker: | Robert Beig (Vienna) |
| Date: | Thu, 26.04.2018 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Arbeitsgruppe Gravitation, Währinger Strasse 17, Raum 218, 2. Stock, 1090 Wien |
| Contact: | P.T. Chrusciel, D. Fajman |
| Thermodynamics sheds light on black hole dynamics |
| Speaker: | Marcela Cardenas (APC Paris & Talca U.) |
| Abstract: | We propose to unify two a priori distinct aspects of black hole physics: their thermodynamics, and their description as point particles, which is an essential starting point in the post-Newtonian approach to their dynamics. We will find that, when reducing a black hole to a point particle endowed with its specific effective mass, one in fact describes a black hole satisfying the first law of thermodynamics, such that its global charges, and hence its entropy, remain constant without variation. This gives a thermodynamical interpretation of its effective mass, thus opening a promising synergy between black hole thermodynamics and the analytical approaches to the two-body problems in gravity theories. To illustrate this relationship, the Einstein-Maxwell-dilaton (EMD) theory, which contains simple examples of asympotically flat, hairy black hole solutions, will serve as a laboratory. |
| Date: | Thu, 26.04.2018 |
| Time: | 16:00 |
| Duration: | 60 min |
| Location: | SEM 136, TU Wien, Freihaus, 10th floor (Wiedner Hauptstr. 8-10, A-1040 Vienna) |
| Contact: | Daniel Grumiller and Timm Wrase |
|